need help with crazy hen...

Help please I'm not sure what to do about my nutty little hen. She is a seven month old silkie who started laying about the first of the year. She has become broody and I have tried everything to get her out of this funk.

First she tried to hatch the golf ball, but I took that away. Than she kept trying to hatch other hens eggs. We now check for and remove eggs from the nesting box a few times a day. We only have two nesting boxes for our eight hens, and she is hogging the one. We actually have two other hens that will get in the box with her and push her to the back so they can lay an egg. Than she tries to set on that too!!!

We have tried taking her out of the nest several times, and all she does is have some food and water than goes back to the nest.

Any suggestions??